The best solution would be to delete the brackets and replace “and” by “or”, on condition that a provision was added stating that, if the State in which the corporation was formed and the State in whose territory it had its registered office were different, the State entitled to exercise diplomatic protection on its behalf would be the one with which the corporation had the closest connection.
Lo mejor sería suprimir los corchetes y reemplazar “y” por “o”, siempre que se agregue una disposición en el sentido de que, siendo distintos el Estado en que se ha constituido la sociedad y aquel en cuyo territorio ésta tiene su domicilio social, el Estado facultado para ejercer la protección diplomática a su favor será aquel de los dos con el que la sociedad tiene los vínculos más estrechos.